Tool-life and wear mechanisms of CBN tools in machining of Inconel 718

By J. Costes, Yoann Guillet, G. Poulachon, M. Dessoly. 2007

261 citations recorded by the source corpus.

The demand for increasing productivity when machining heat resistant alloys has resulted in the use of new tool materials such as cubic boron nitride (CBN) or ceramics. However, CBN tools are mostly used by the automotive industry in hard turning, and the wear of those tools is not sufficiently known in aerospace materials. In addition, the grade of these tools is not optimized for superalloys due to these being a small part of the market, although expanding (at 20% a year). So this investigation has been conducted to show which grade is optimal and what the wear mechanisms are during finishing operations of Inconel 718. It is shown that a low CBN content with a ceramic binder and small grains gives the best results. The wear mechanisms on the rake and flank faces were investigated. Through SEM observations and chemical analysis of the tested inserts, it is shown that the dominant wear mechanisms are adhesion and diffusion due to chemical affinity between elements from workpiece and insert.

Subfields: Biomedical Engineering, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/56193c31704dd1b21cbcd0aaaff8fb1b5623da02

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In Biomedical Engineering

1. Mihai Nicolescu
2. S. Pervaiz
3. Amir Rashid
4. Ibrahim M. Deiab

In Materials Chemistry

1. Mihai Nicolescu
2. S. Pervaiz
3. Amir Rashid
4. Ibrahim M. Deiab

In Mechanical Engineering

1. Mihai Nicolescu
2. S. Pervaiz
3. Amir Rashid
4. Ibrahim M. Deiab

Citations in the corpus

• Analysis of tool wear patterns in finishing turning of Inconel 718 (2013, background): “Cubic Boron Nitride (CBN) cutting tools give good performance and considerable increment in cutting speed when machining nickel-based alloys due to their notch wear resistance, however it should be considered their elevated cost [6,7].”
• Influence of Tool Materials on Machinability of Titanium- and Nickel-Based Alloys: A Review (2014, background): “[143] conducted machining experiments to investigate the optimum composition of CBN content when machining Inconel 718.”
• Effects of Selective Laser Melting additive manufacturing parameters of Inconel 718 on porosity, microstructure and mechanical properties (2018, methodology): “However, it is di ffi cult to manufacture workpieces from Inconel 718 using conventional machining methods due to the signi fi cant level of wear to which the cutting tools are subjected and the reduced rate of material removal [6,7].”